Mixing-tank for carbonators.



H. M. SMITH.

MIXING TANK FOR CARBONATORS.

APPLICATlON FILED SEPT. 28, 1910.

Patented Dec. 21,1915.

HORACE M. SMITH, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE LIQUID CARBONIC COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MIXING-TANK FOR CARBONATORS.

Application filed September To all whom itmag concern:

Be it known that I, HORACE M. SMITH, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useart that mixing tanks for carbonators consist usually of a cast shell which is lined with tin. Tin particularly is employed for lining these tanks because it is not attacked nor affected by the carbonic acid which is present in quantities when the tank is in use. Mixing tanks of various forms have heretofore been employed, but so far as I am aware these tanks have been of such shape that in lining them it .was necessary to build up a lining. of sheet tin sections. These sectlons were out to the desired shape and then soldered together at their edges thereby producing anumber of soldered seams. The cutting of the sheet tin to fit the interior of the tank and the soldering "of the same together, involve considerable time and expense, and furthermore, each seam provided in a tank lining increases the liability of leakage and the escape of carbonic acid or gas through the lining into the outer shell of the tank Where it will attack the iron.

The tank which forms the subject matter of the present invention is composed of duplicate sections and is so shaped that a lining for each section thereof can be spun out of a solid sheet of tin and fitted into each cast section or shell without "cutting the lining or soldering any seams. The cast'shell of the present tank, furthermore, is made thickest at the point where the greatest strength is required and gradually tapers away to the thinnest portion'wherethe least strength is required.

Various other objects and advantages of the present tank will become apparent as it is better understood from the following de- Patented Dec. 21, 1915.

28,1910. Serial 1m- 584,169. I

scription when taken in connection with the accompanying drawing which illustrates a preferred embodiment of the invention.

On the drawing the tank which is designated generally as 1 is shown in vertical section, said view being taken approximately on the longitudinal axis of the tank. As will be evident from the drawing the tank is composed of duplicate sections 2 and 2, respectively. Since the two sections are substantially alikea detail description of one will be sufficient for an understanding of the invention.

Referring to the upper section 2, .it will be seen that it comprises a spherical portion 3 forming one end of the tank which merges into a frusto-conical portion 4 whose smaller end forms a continuation of the spherical portion 3. The larger open end of the frusto-conical portion is turned outwardly to provide a radial peripheral flange 5 extending entirely around the same and 'pro-..

vided at intervals with holes through which the bolts 6 pass, said bolts being equipped,

with nuts 7 to draw the sections of the tank together and firmly unite them. Each section shaped as above described, is preferably made of cast iron, and the tapered formation of the sections renders it easy to draw the patterns out of the sand, thus reducing the time and expense of cast-. ing to a minimum. The walls of the frustoconical portion gradually increase in thickness from the edge of the spherical portion to the flange 5. This thickenedportion 8 is 'thickest and strongest adjacent the flange and at the point where the greatest strength is needed. The thickening of the side wall at this point also avoids a sharp corner at the juncture of the flange and permits the grain of the metal to change direction grad ually when the hot ironv cools thus preventing blow-holes and materially strengthening the structure at the juncture of the flange.

In order to protect the cast shell from the action of the carbonic acid in the tank, there is provided the usual lining 9 of tin which is shaped to conform to the interior of the cast shell. It is well known to thosev familiar with the spinning of metalthat it is very diificult to spin a cylindrical receptacle such as would fit within an ordinary cylindrical tank, and consequentlythe cylindrical tanks which, have heretofore been employed a large extent, have been lined'by cutting sheet the-liabilityjof leakage in each tank thus equipped. A lining which tapers inwardly from its open endand terminates in a spherical bottom such as is adapted to fit within each of my tank sections is, however, very easy to spin, and the cost'of production of such a spun lining is much less and the .Wearing qualities much greater than that of any built-up or sectional lining employed previous to my invention. The flanges 10 may be" formed upon the open end of the liningsec: tion either before or after it has been placed in the cast shell.

When. two. cast shellsfareprovided as above described, and are lined with solid 1 tive relat1on,-'wherebv-a fluid-tight joint be seamless tin linings, they may be securely fastened together by a series of bolts (iconnecting the radial flanges, with. the result that the completed tank possesses a smoothinterior entirely free from seams and devoid of solder. The exterior of the tank when 7 formed in this manner presents a smooth and pleasing appearance to the eye."-;.

What I desire to claim is: V

A mixing tank for. a' carbonator, com

posed of two cast metal sections of similar torm, each. comprlslng a spherical. and portion eXten'ding-intda frusto conical portion n an unbroken curve and termmatmgm an outwardly extending radial fiange, the ma terlal of-said frusto-conical portionincreas ing in thickness from said spherical portion 7 to the outer periphery of said. flange, each of and having 'integral flang'es corresponding to and overlying the flanges "of said sections, 4

and means for securing the flanges ofvsaid sections together -with the; flanges of the spun metal linings firmly'fheld in cooperatween the sections is formed-1} jlllitnesses:

' Villa. .0. BELT,

, H A; KIDDIE.

HORACE, M. SMITH. 

